Revert of Reland: Remove register index/code indirection

src/arm/macro-assembler-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
-#include "src/register-configuration.h"
 #include "src/runtime/runtime.h"
 
 #include "src/arm/macro-assembler-arm.h"
 
 namespace v8 {
 namespace internal {
 
 MacroAssembler::MacroAssembler(Isolate* arg_isolate, void* buffer, int size)
     : Assembler(arg_isolate, buffer, size),
       generating_stub_(false),
@@ skipping 728 matching lines @@
 
 MemOperand MacroAssembler::SafepointRegisterSlot(Register reg) {
   return MemOperand(sp, SafepointRegisterStackIndex(reg.code()) * kPointerSize);
 }
 
 
 MemOperand MacroAssembler::SafepointRegistersAndDoublesSlot(Register reg) {
   // Number of d-regs not known at snapshot time.
   DCHECK(!serializer_enabled());
   // General purpose registers are pushed last on the stack.
-  const RegisterConfiguration* config = RegisterConfiguration::ArchDefault();
-  int doubles_size = config->num_allocatable_double_registers() * kDoubleSize;
+  int doubles_size = DwVfpRegister::NumAllocatableRegisters() * kDoubleSize;
   int register_offset = SafepointRegisterStackIndex(reg.code()) * kPointerSize;
   return MemOperand(sp, doubles_size + register_offset);
 }
 
 
 void MacroAssembler::Ldrd(Register dst1, Register dst2,
                           const MemOperand& src, Condition cond) {
   DCHECK(src.rm().is(no_reg));
   DCHECK(!dst1.is(lr));  // r14.
 
@@ skipping 2798 matching lines @@
                                    Register reg5,
                                    Register reg6) {
   RegList regs = 0;
   if (reg1.is_valid()) regs |= reg1.bit();
   if (reg2.is_valid()) regs |= reg2.bit();
   if (reg3.is_valid()) regs |= reg3.bit();
   if (reg4.is_valid()) regs |= reg4.bit();
   if (reg5.is_valid()) regs |= reg5.bit();
   if (reg6.is_valid()) regs |= reg6.bit();
 
-  const RegisterConfiguration* config = RegisterConfiguration::ArchDefault();
-  for (int i = 0; i < config->num_allocatable_general_registers(); ++i) {
-    int code = config->GetAllocatableGeneralCode(i);
-    Register candidate = Register::from_code(code);
+  for (int i = 0; i < Register::NumAllocatableRegisters(); i++) {
+    Register candidate = Register::FromAllocationIndex(i);
     if (regs & candidate.bit()) continue;
     return candidate;
   }
   UNREACHABLE();
   return no_reg;
 }
 
 
 void MacroAssembler::JumpIfDictionaryInPrototypeChain(
     Register object,
@@ skipping 124 matching lines @@
     }
   }
   if (mag.shift > 0) mov(result, Operand(result, ASR, mag.shift));
   add(result, result, Operand(dividend, LSR, 31));
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM